Core for concrete structures.



No. 891,883. PATENTED JUNE 3O, '1908.

, J. VAUGHAN.

CORE P OR- CONCRETE STRUCTURES.

APPLICATION FILED FEB. 6,1998.

2 'illi 3 1% l/VVENTOR 5? M A ATTORNEY points 13.

. side of the core.

UNITE ST JOSEPH VAUGHAN, or ASHLAND, YIRGINIA.

CORE FOR CONCRETE STRUCTURES.

To all whom it may concern:

Be it known that I, Josnrn VAUGHAN, a citizen of the United States, residing at Ashland, in the county of Hanover and State of Virginia, have invented certain new and useful Improvements in Cores for Concrete Structures, of which the following is a specification.

My invention relates to cores for forming hollow spaces in concrete walls, and its objeet isto provide a device of the class described which shall be sufliciently rigid for the pur' ose for which it is used; which may be easi y withdrawn from the wall; and which shall be economical in construction.

In the accompanying drawings, which form a part of this specification, and in which like numerals refer to like parts in the several views :Figure 1 is a view of the core in plan, and shows the core locked and ready for use in forming a hollow space 'in a concrete wall; Fig.2 is a vertical section taken on line ab in Fig. 1; Fig. 3 shows, in lan, the core collapsed, and ready to be wit drawn from the wall, or to-be raised to a higher position; and Fig. 4 is a vertical sectio taken on line cd in Fig. 2.

In Fig. 1 side plates 1, 2 and 1, 5 are hinged together, respectively, at the points 3 and 6. End plates 7, 8 and 10, 1.1 are hinged. together, res ectively, at the points 9 and 12. The hinge side plates are themse ves hinged together at the On the plates 1, 5, 7 and 10 are pivoted the locking bars 14, 14 and 15, 15. These bars are arranged to swing across the adjacent hinges 3, 6, 9 and 12;and to drop into the catches 16; and they are so fitted in relation to the parts to which the T are attached that the ',latter are held rigid y in position when they, the bars, are inserted in the catches. For instance, when the bar 14 which is pivoted to the side plate 1 is dropped into its catch 16, the two plates 1 and 2 are held rigidly in line with one another; the hinge .3 being prevented fron opening. In the drawings only one locking bar has been shown on each More than one may be so used if found advisable owing to the depth of the core.

The locking bars are provided with projecting parts 17," 17 and 18, 18; the said projecting parts aflordin means by 'which the are maybe operate through the medium of a hooked rod. 'Forinstance, when it is Specification of Letters Patent.

Application filed February 6, 1908.

lates and the hinged end Patented June 30, 1908.

Serial No. 414,557.

desired to unlock the bars 14, the rod is caused to catch in the projecting part 17, and is then pulled upwards; the bar being thus lifted from the catch 16.

When the concrete wall has set suliiciently for the core to be withdrawn, the locking bars 14 and 15 are lifted from the catches 16, permitting the hinges 3, 6, 9 and 12 to operate inwardly, thus collapsing the core (see Fig. 3). The core now covers a smaller area, or in other words its overall dimensions are less, than when it is locked in position as in Fig. 1; and consequently it can be readily removed from the wall, or raised to a higher position.

In Fig. 2 is shown a projecting lu or pin 19. Like pins are placed in similar y relative positions to each of the locking bars. WVhen the bars are lifted from the catches, and the core is collapsed, the bars fall until they rest on these pins, and are by them prevented from falling so far as to make it difficult to reset them when the core is to be again locked in position.

Ilaving now described my invention, what I claim, and desire to protect by Letters Patent of the United States, is t- 1. A collapsible core having hin ed side plates and hinged end plates, means or lockmg the hinges of the said side and end plates, and hinges connecting the side and end plates.

2. In a collapsible core, the combination of side plates having'- inwardly operating hinges about their centers, end plates having inwardly operating hinges about their centers, means for locking the said hinges, and

hinges connecting the side plates and end plates.

3. In a collapsible core, the combination of side and end plates, said side plates being fixedly connected with said end lates at their adjacent ends, flexing means for bring ing towards one another the extremities of the said side and end plates, and means for counteracting the flexing means so that the extremities of the said side and end plates may be held at their greatest distance apart.

4. In a collapsible core, the.combination of side plates and end plates, said side plates being flexibly connected with said-end plates at their adjacent ends, inwardly operating flexing means for brin ing toward one another the extremities o the said side plates and end plates, and means for counteracting the fiexmg means so that the extremities'o 7 end plates being connected together at their and means for counteracting the flexing the said side and end plates may be held at l of the side plates 1, 2, 4 and 5, the said side their greatest distance apart. plates having hinges 3 and 6; end plates 7, i8, 15 5. In a collapsible core, the combination 10 and 11, the said end plates having hinges of side plates and end plates, said side and l 9 and 12; the locking bars 14 and 15; tm catches 16; and means for connecting the side and end plates.

In testimony whereof I afiix my in presence of two Witnesses.

JOSEPH VAUGHA adjacent ends, inwardly operating flexing means for bringing toward one another the signature, 20 extremities of the said side and end plates,

means so that the extremities of the said side and end plates may be held at their greatest Witnesses:

distance apart. CHAS. P. LEE,

6. In a collapsible core, the combination J. H. FLIPPEN. 

